"Key to the Highway" (1940)

Wikipedia - "'Key to the Highway' is a blues standard first recorded by blues pianist Charlie Segar in 1940. The song was also recorded by Jazz Gillum and Big Bill Broonzy in 1940–41, and it was later a R&B record chart success for Little Walter in 1958. ... Musically, however, there are differences in the recorded versions. Charlie Segar's original 'Key to the Highway' was performed as a mid-tempo twelve-bar blues. When Jazz Gillum recorded it later that year with Broonzy on guitar, he used an eight-bar blues arrangement (May 9, 1940 Bluebird B 8529). In two different interviews, Gillum gave conflicting stories about who wrote the song: in one, he claimed sole authorship, in another he 'specified Broonzy as the real author'."
Wikipedia
YouTube: Charles Segar, Jazz Gillum, Little Walter, Sonny Terry and Brownie McGhee, Derek & the Dominos